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dc.contributor.author
Looser, Tobias J.
dc.contributor.author
Lilly, Simon
dc.contributor.author
Sin, Larry P. T.
dc.contributor.author
Henriques, Bruno M. B.
dc.contributor.author
Maiolino, Roberto
dc.contributor.author
Cirasuolo, Michele
dc.date.accessioned
2021-07-08T10:37:50Z
dc.date.available
2021-06-23T03:12:05Z
dc.date.available
2021-07-08T10:37:50Z
dc.date.issued
2021-06
dc.identifier.issn
0035-8711
dc.identifier.issn
1365-2966
dc.identifier.issn
1365-8711
dc.identifier.other
10.1093/mnras/stab1061
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/490830
dc.description.abstract
We investigate the performance of group finding algorithms that reconstruct galaxy groups from the positional information of tracer galaxies that are observed in redshift surveys carried out with multiplexed spectrographs. We use mock light-cones produced by the L-Galaxies semi-analytic model of galaxy evolution in which the underlying reality is known. We particularly focus on the performance at high redshift, and how this is affected by choices of the mass of the tracer galaxies (largely equivalent to their co-moving number density) and the (assumed random) sampling rate of these tracers. We first however compare two different approaches to group finding as applied at low redshift, and conclude that these are broadly comparable. For simplicity we adopt just one of these, ‘Friends-of-Friends’ (FoF) as the basis for our study at high redshift. We introduce 12 science metrics that are designed to quantify the performance of the group-finder as relevant for a wide range of science investigations with a group catalogue. These metrics examine the quality of the recovered group catalogue, the median halo masses of different richness structures, the scatter in dark matter halo mass and how successful the group-finder classifies singletons, centrals, and satellites. We analyse how these metrics vary with the limiting stellar mass and random sampling rate of the tracer galaxies, allowing quantification of the various trade-offs between different possible survey designs. Finally, we look at the impact of these same design parameters on the relative ‘costs’ in observation time of the survey using as an example the potential MOONRISE survey using the MOONS instrument.
en_US
dc.language.iso
en
en_US
dc.publisher
Oxford University Press
en_US
dc.subject
catalogues – surveys – galaxies
en_US
dc.subject
groups
en_US
dc.subject
general – galaxies
en_US
dc.subject
high-redshift – dark matter – large-scale structure of Universe
en_US
dc.title
Optimizing high-redshift galaxy surveys for environmental information
en_US
dc.type
Journal Article
dc.date.published
2021-04-21
ethz.journal.title
Monthly Notices of the Royal Astronomical Society
ethz.journal.volume
504
en_US
ethz.journal.issue
2
en_US
ethz.journal.abbreviated
Mon. Not. R. Astron. Soc.
ethz.pages.start
3029
en_US
ethz.pages.end
3057
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.place
Oxford
en_US
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::03613 - Lilly, Simon / Lilly, Simon
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02010 - Dep. Physik / Dep. of Physics::03613 - Lilly, Simon / Lilly, Simon
ethz.date.deposited
2021-06-23T03:12:12Z
ethz.source
SCOPUS
ethz.eth
yes
en_US
ethz.availability
Metadata only
en_US
ethz.rosetta.installDate
2021-07-08T10:37:57Z
ethz.rosetta.lastUpdated
2022-03-29T10:19:11Z
ethz.rosetta.exportRequired
true
ethz.rosetta.versionExported
true
ethz.COinS
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